Reply
 
LinkBack Thread Tools Display Modes
Old 07-15-2012   #1
 
DIYMA freshman
Join Date: Jun 2012
Location: londonderry, NH
Posts: 5

Rep Power: 0 imacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enough


iTrader: (0)



Default t-line box design problems. need help

so, i'm having this problem with my t-line design. i want to put this one 8" jbl gt82d in a tline box for my room.
specs for the box:
port length: 6ft
port area: 30-33cu in
fs: 47
line is flattest around 44hz on winisd at 1cu ft

my problem:
the box is tuned to 32hz and i'd like to get it to 44. making the box smaller or changing the port area(smaller) will raise the tuning. if i do that, though, the box gets too small(around .5-.8).



any ideas?
imacf90 is offline   Reply With Quote
Old 07-15-2012   #2
Upgrade Your Membership!
 
DIYMA Loyalist
Join Date: Sep 2006
Location: Manhattan
Age: 52
Posts: 3,342

Rep Power: 138 Patrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura about


iTrader: (0)



Default Re: t-line box design problems. need help

T-line? WinISD sucks. And it's unable to simulate transmission lines.

Never draw what you can swipe. Never swipe what you can trace. Never trace what you can photocopy. Never photocopy what you can clip out and paste down. (Wally Wood)
Patrick Bateman is offline   Reply With Quote
Old 07-15-2012   #3
 
DIYMA freshman
Join Date: Jun 2012
Location: londonderry, NH
Posts: 5

Rep Power: 0 imacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enough


iTrader: (0)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by Patrick Bateman View Post
T-line? WinISD sucks. And it's unable to simulate transmission lines.
well then what would you recommend i use? i have it set for ported, seeing how that's all a t-line really seems to be(a ported box with a really long port).
imacf90 is offline   Reply With Quote
Old 07-15-2012   #4
DIYMA 500 Club
 
minbari's Avatar
 
DIYMA super monkey!
Join Date: Mar 2011
Location: STL, MO
Age: 41
Posts: 10,815

Rep Power: 165 minbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to all


iTrader: (0)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by Patrick Bateman View Post
T-line? WinISD sucks. And it's unable to simulate transmission lines.
I wouldnt use winISD for that. it works fine for sealed, bandpass and ported. but nothing exotic.

Original post whore!
Bent Nail Brewery

2013 Fiesta, Stock Sync HU |AC LC2i | Phoenix Gold EQ215i | Soundstream SA120 -> ID CD1eMH | Phoenix Gold T500.2 -> ID X65 | JL 500/1 -> (2) 15" Pyle PL1590BL in IB
minbari is online now   Reply With Quote
Old 07-15-2012   #5
DIYMA 500 Club
 
minbari's Avatar
 
DIYMA super monkey!
Join Date: Mar 2011
Location: STL, MO
Age: 41
Posts: 10,815

Rep Power: 165 minbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to all


iTrader: (0)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by imacf90 View Post
well then what would you recommend i use? i have it set for ported, seeing how that's all a t-line really seems to be(a ported box with a really long port).
that is not what it is, it behaves differently.

look into hornresp. I beleive that will simulate t-lines.

Original post whore!
Bent Nail Brewery

2013 Fiesta, Stock Sync HU |AC LC2i | Phoenix Gold EQ215i | Soundstream SA120 -> ID CD1eMH | Phoenix Gold T500.2 -> ID X65 | JL 500/1 -> (2) 15" Pyle PL1590BL in IB
minbari is online now   Reply With Quote
Old 07-15-2012   #6
 
DIYMA freshman
Join Date: Jun 2012
Location: londonderry, NH
Posts: 5

Rep Power: 0 imacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enough


iTrader: (0)



Default Re: t-line box design problems. need help

regardless of whether winisd is good or not. 32hz seems like a pretty low tuning. i don't think it would sound all that great. i've been messing with the numbers for a while and it's not fixing anything. i could always take the risk of keeping it the way it is, but i would never know what kind of response ill get out of it.
imacf90 is offline   Reply With Quote
Old 07-16-2012   #7
DIYMA 500 Club
 
DIYMA Loyalist
Join Date: Mar 2010
Location: uk
Posts: 2,752


Rep Power: 91 The Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the rough


iTrader: (1)



Default Re: t-line box design problems. need help

try hornresp for modeling:Hornresp


Quote:
Originally Posted by BuickGN View Post
Regardless, I agree with Baron

The Baron Groog is offline   Reply With Quote
Old 07-16-2012   #8
DIYMA 500 Club
 
Chaos's Avatar
 
Addicted to 12 Volt
Join Date: Oct 2005
Location: USA
Posts: 2,842

12V Company:
TAS Electronics
Position:
Install Tech

Rep Power: 141 Chaos will become famous soon enoughChaos will become famous soon enoughChaos will become famous soon enoughChaos will become famous soon enoughChaos will become famous soon enoughChaos will become famous soon enoughChaos will become famous soon enough


iTrader: (16)



Default Re: t-line box design problems. need help

Transmission lines are a different beast than typical vented bass reflex cabinets.

Now you're getting into quarter-wave design, which requires more sophisticated mathematical models to predict response.

Bottom line, if you are willing to spend the effort to read up on it, HornResp is a powerful DIY tool for more exotic alignments. If not, you are wasting your time.
Chaos is offline   Reply With Quote
Old 07-16-2012   #9
 
DIYMA freshman
Join Date: Jun 2012
Location: londonderry, NH
Posts: 5

Rep Power: 0 imacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enoughimacf90 will become famous soon enough


iTrader: (0)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by Chaos View Post
Transmission lines are a different beast than typical vented bass reflex cabinets.

Now you're getting into quarter-wave design, which requires more sophisticated mathematical models to predict response.

Bottom line, if you are willing to spend the effort to read up on it, HornResp is a powerful DIY tool for more exotic alignments. If not, you are wasting your time.
alright, thanks. guess ill just stick with the simple stuff. this program reminds me of when i was a kid and looked through my dads old college books with all sorts of equations and everything. always hurt my brain trying to figure it out. the last thing i want to do is study for a couple weeks just to know some basic information about how a woofer will work in a box.
my original design was a pvc ported box.
imacf90 is offline   Reply With Quote
Old 07-17-2012   #10
DIYMA 500 Club
 
DIYMA Loyalist
Join Date: Mar 2010
Location: uk
Posts: 2,752


Rep Power: 91 The Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the roughThe Baron Groog is a jewel in the rough


iTrader: (1)



Default

http://www.mh-audio.nl/TML.asp for a quick calc go here and enter a few spec, very easy


Sent from my Motorola DynaTAC using Tapatalk


Quote:
Originally Posted by BuickGN View Post
Regardless, I agree with Baron

The Baron Groog is offline   Reply With Quote
Old 07-17-2012   #11
DIYMA 500 Club
 
DIYMA Regular
Join Date: Aug 2007
Location: Norwalk CT
Age: 28
Posts: 700

Rep Power: 101 its_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the roughits_bacon12 is a jewel in the rough


iTrader: (37)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by minbari View Post
that is not what it is, it behaves differently.

look into hornresp. I beleive that will simulate t-lines.

Use that program.

ραηςετα
its_bacon12 is offline   Reply With Quote
Old 07-18-2012   #12
 
DIYMA Novice
Join Date: Jun 2010
Location: Laredo, Tx
Posts: 356

Rep Power: 59 Oscar will become famous soon enoughOscar will become famous soon enoughOscar will become famous soon enoughOscar will become famous soon enoughOscar will become famous soon enoughOscar will become famous soon enough


iTrader: (1)



Default Re: t-line box design problems. need help

In any event, you'll only able to fee it about 9V RMS, which into a 2.3 DC resistance of that speaker, is about 35 W RMS, lol. That thing has a WHOPPING 3.8mm of Xmax. I think some tweeters now have that much, lol.
Oscar is offline   Reply With Quote
Old 07-18-2012   #13
Upgrade Your Membership!
 
DIYMA Loyalist
Join Date: Sep 2006
Location: Manhattan
Age: 52
Posts: 3,342

Rep Power: 138 Patrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura about


iTrader: (0)



Default Re: t-line box design problems. need help

Quote:
Originally Posted by minbari View Post
I wouldnt use winISD for that. it works fine for sealed, bandpass and ported. but nothing exotic.
I wish that were true

Ports are ultra complex - and WinISD doesn't capture that complexity.

Basically if your box has a port, use Hornresp.

Never draw what you can swipe. Never swipe what you can trace. Never trace what you can photocopy. Never photocopy what you can clip out and paste down. (Wally Wood)
Patrick Bateman is offline   Reply With Quote
Old 07-18-2012   #14
Upgrade Your Membership!
 
DIYMA Loyalist
Join Date: Sep 2006
Location: Manhattan
Age: 52
Posts: 3,342

Rep Power: 138 Patrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura aboutPatrick Bateman has a spectacular aura about


iTrader: (0)



Default Re: t-line box design problems. need help



Quote:
Originally Posted by imacf90 View Post
alright, thanks. guess ill just stick with the simple stuff. this program reminds me of when i was a kid and looked through my dads old college books with all sorts of equations and everything. always hurt my brain trying to figure it out. the last thing i want to do is study for a couple weeks just to know some basic information about how a woofer will work in a box.
my original design was a pvc ported box.
Don't feel bad, I've been doing boxes for almost two decades and half my subs are just complete crap. It's really easy to screw up any of the complex box types, that's the reason that so many band pass boxes sound terrible. There's nothing wrong with band pass, but it's easy to blow it.

Oddly enough, I'd argue that tapped horns are probably one of the easiest box types to get right, because theyre actually less complex than a plain ol vented box.

Never draw what you can swipe. Never swipe what you can trace. Never trace what you can photocopy. Never photocopy what you can clip out and paste down. (Wally Wood)
Patrick Bateman is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
Milbert
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 10:35 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Powered by vBadvanced CMPS v3.2.3

Ad Management by RedTyger

Meet Our Team | Forum | Privacy and Rules | Advertise | Archive | Search | Contact Us

Home | User CP | Members List | New Posts | ITrader | Faq | Post Spy